1914] Field—Hybrid Butterflies of the Genus Basilarchia 7 
The accompanying plate shows a male and a female of pro- 
serpina, and two males of arthechippus, chosen from the two series 
just described. These specimens, with others more worn and 
disfigured by their prolonged detention in the breeding cages, are 
in the Museum of Comparative Zoélogy at Harvard University. 
The tattered remains of the parents of both broods will be found 
in the same case. 
Publication of this record has been delayed in the hope of ob- 
taining new hybrids and breeding them to further generations; but 
though success seemed very close in the experiments of 1912 and 
1913, no progress has been made. The work has been resumed 
with abundant material, and the present summer may witness 
some definite results. At all events, the hybrid character of arthe- 
chippus and proserpina is now established; and observations 
already published (Field, 1910) make it clear that proserpina 
will at least breed with one of the parent species. Increased 
interest thus attaches to the butterflies of this always interesting 
genus. 
BIBLIOGRAPHY. 
Bateson, W. 
1913. Problems of Genetics. New Haven: Yale University Press. 
Field, W. L. W. 
1904. Problems in the genus Basilarchia. Psycue, xi, 1-6, 3 pl. 
1910. The offspring of a captured female Basilarchia proserpina. PsyYcHE, 
‘xvii, 87-89, 1 pl. 
Scudder, S. H. 
1889. The Butterflies of the Eastern United States and Canada, with special 
reference to New England. Cambridge: published by the author. 
Nore on Linognathus forficula KEtLoGa AND PAINE. 
Through recent correspondence with H. Fahrenholz of Hannover, Germany, an 
active worker with the Anoplura, the writer has received information which con- 
cerns the nomenclature of Linognathus forficula, described by Kellogg and Paine 
from Cervicapra arundinum. The generic position of Rudow’s Hematopinus 
forficulus 2 has, on account of an insufficient description, been considered doubtful. 
However, Fahrenholz has come into possession of a series of specimens of Rudow’s 
species which reveals the fact that it must be placed in the genus Linognathus. 
The name L. forficula, therefore, as applied to Kellogg and Paine’s species, must 
give way, on account of priority, and is herewith substituted by the name Linog- 
nathus fahrenholzi. : Je hle PATNE: 
1 Kellogg, V. L. and Paine, J. H. Anoplura and Mallophaga from African Hosts; Bull. 
Ent. Research, Vol. II, p. 147, July, 1911. 
2 Rudow, Zeitschr. f. gew. Naturw. Vol. 34, p. 169 (1869). 
